Keysight Technologies 3458A Guide D'utilisation page 282

6 Command Reference
LFILTER
Level filter. Enables or disables the level filter function. When enabled, the level
filter function connects a single pole low-pass filter circuit to the input of the
level-detection circuitry. The low-pass filter has a 3-dB point of 75 kHz and
prevents high frequency components from causing false triggers.
Syntax
LFILTER [control]
control
The control parameter choices are:
control
parameter
OFF
ON
Power-on control = OFF.
Default control = ON.
Remarks
– Level filtering can be used when level triggering for DC voltage, direct- and
– Query command: The LFILTER? query command returns the present level filter
– Related commands: DCV, DSAC, DSDC, FREQ, LEVEL, NRDGS, PER, SETACV,
Example
OUTPUT 722;"LFILTER ON" !ENABLES THE LEVEL FILTER
282
Numeric
query equiv.
0
1
sub-sampling. The level filter can also be used to reduce sensitivity to noise for
frequency and period measurements or when making AC or AC+DC voltage
measurements using the synchronous method (SETACV SYNC command).
mode. Refer to Query commands
information.
SYNC, SLOPE, SSAC, SSDC, SSRC, TRIG
Description
Disables the level filter; no filtering is done
Enables the level filter
near the front of this chapter for more
Keysight 3458A User's Guide